663451 ÷ 99 
Let's see how many times 99 fits into 663451.

Step 1:
The number 99 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 99

Moving on to step 2:
If we divide 66 by 99, we get 0 and a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Take the next digit (3) from the dividend and append it to 66, then repeat: 663 / 99

Going ahead to step 3:
99 can be fit into 663 6 times, resulting in a remainder of 69.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 594 from 663, we get 69.
Append the next digit (4) from the dividend to 69 and continue with: 694 / 99

Going ahead to step 4:
When dividing 694 by 99, we get 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 67.0
Subtracting 693 from 694 leaves us with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 99

Let's proceed to step 5:
99 goes into 15 0 times with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 670.0
The remainder is 15 after subtracting 0 from 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 99

Advancing to step 6:
99 goes into 151 1 times with a remainder of 52.
Use 1 as the next digit of our solution. 
Result so far: 6701.0
Subtract 99 from 151 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 7:
99 goes into 520 5 times with a remainder of 25.
The next digit of our result is 5. 
Result so far: 6701.5
The remainder is 25 after subtracting 495 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 8:
If we divide 250 by 99, we get 2 and a remainder of 52.
Write down 2 as next digit of the result. 
Result so far: 6701.52
Subtracting 198 from 250 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 9:
520 divided by 99 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 6701.525
If we take 495 away from 520, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 10:
250 divided by 99 is 2 with a remainder of 52.
Put 2 as the next digit of the answer. 
Result so far: 6701.5252
Subtracting 198 from 250 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 11:
99 goes into 520 5 times with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 6701.52525
Subtracting 495 from 520 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 12:
99 goes into 250 2 times with a remainder of 52.
Write down 2 as next digit of the result. 
Result so far: 6701.525252
Subtract 198 from 250 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 13:
99 can be fit into 520 5 times, resulting in a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 6701.5252525
If we take 495 away from 520, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 14:
The number 99 fits into 250 2 times, leaving a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 6701.52525252
The remainder is 52 after subtracting 198 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The quotient of the division is 6701.52525252, and the remainder is 5.2e-08.